130 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
beyond basal scales about equal to diameter of eye. Dorsal inserted half way between base of caudal 
and anterior edge of pupil, its base contained 6§- times in length of bead and body, its height 5f-; the 
last rays a little higher than the iirst. Anal advanced close to base of ventrals ; first and second l ays 
short, closely attached to the next; third ray greatly enlarged and lengthened ; a loosely attached, 
ovate, fleshy pad near its tip; fourth and fifth rays slender, as long as the third; tips of the third 
and fifth rays bent toward that of the fourth; sixth to ninth rays about half as long as third. 
Caudal rounded, its length contained 3-J- times in head and body. Pectorals rounded; their length 
contained 1J times in head. Yentrals pointed, extending to middle of longest anal ray. 
Color in alcohol, light yellowish-olive; much lighter on breast and ventral part of head; posterior 
edges of scales dark; lower jaw, preorbital area, upper part of head, and a narrow, median dorsal 
stripe, dark; basal three-fifths of dorsal fin black; distal part of fin white; boundary between white 
and black parts more definite on anterior than on posterior part of fin; basal two-thirds of caudal 
dusky; distal part without color. Other male specimens have only a few small dark spots on dorsal 
and caudal. 
Body of female more elongate than that of male; depth of caudal peduncle 5f in length. 
Dorsal fin inserted in advance of anal, its origin above anal opening; first rays highest. Yentrals 
extend to posterior edge of vent, but do not reach anal. The dorsal and caudal have a little dusky 
coloring. 
Measurements of P cecilia limantouri. 
Measurements. 
Locality : Rio Tamesoe, near Tampico, 
Tamaulipas, Mexico. 
Locality: Riolxtlaat 
Puente de Ixtla, ! 
Morelos, Mexico. 
Male. 
Female. 
Male. 
Female. 
Length of hotly in millimeters. . . 
Depth of hotly expressed in lmu- 
46 
44 
42 
42 
38 
57 
53 
48 
44 
44 
40 
37 
49 
42 
dredths of length 
32 
32 
35 
32 
32 
27 
30 
33 
30 
32 
31 
30 
31 
Depth of caudal peduncle 
22 
22 
21 
20 
20 
17 
18 
18 
19 
19 
23 
20 
18 
20 
Length of head 
28 
27 
29 
29 
28 
27 
26 
29 
29 
29 
28 
28 
26 
27 
Width of interorbital space 
13 
14 
13 
14 
1.4 
14 
14 
14 
15 
15 
13 
12 
14 
13 
Length of snout 
10 
10 
10 
11 
10* 
10 
10 
9 
10 
ii 
10 
9 
9 
10 
Width of mouth 
10 
9 
91 
9 
10 
10 
10 
9 
9 
9 
8 
9 
9 
9 
Diameter of orbit 
8 
8 
9 
8 
9 
8 
8 
8 
8 
8 
8 
8 
7 
8 1 
Distance from snout to dorsal. . . 
56 
56 
55 
56 
57 
62 
58 
60 
61 
60 
57 
58 
61 
66 
Height of longest dorsal rays 
18 
17 
17 
17 
16 
11. 
13 
13 
17 
14 
26 
24 
18 
16 
1 )i stance from snout to anal 
50 
52 
53 
53 
55 
66 
63 
64 
65 
65 
52 
48 
66 
67 
Height of longest anal rays 
22 
22 
24 
24 
23 
15 
16 
16 
14 
15 
24 
23 
17 
19 
Distance from anal to caudal. . . . 
51 
50 
47 
49 
47 
33 
35 
34 
35 
34 
50 
50 
30 
32 
28 
Length of caudal 
30 
29 
30 
28 
28 
26 
26 
24 
25 
27 
33 
30 
28 
Length of pectoral 
23 
23 
22 
23 
23 
20 
20 
22 
21 
22 
25 
22 
22 
21 
Distance from snout to ventral.. 
45 
46 
48 
40 
46 
50 
47 
50 
52 
50 
45 
45 
52 
54 
Length of ventral 
17 
18 
17 
13 
18 
13 
13 
13 
12 
13 
19 
18 
13 
13 
Number of rays in dorsal 
9 
9 
9 
9 
9 
8 
9 
9 
9 
9 
9 
9 
9 
9 
Number of rays in anal - - - 
8 
8 
8 
8 
8 
8 
8 
8 
8 
8 
8 
8 
8 
8 
Number of scales in lateral series. 
Number of scales in transverse 
26 
27 
26 
27 
27 
26 
27 
26 
27 
28 
27 
26 
26 
25 
series 
Number of scales on caudal pe- 
9 
9 
9 
9 
9 
8 
9 
9 
9 
9 
9 
9 
9 
9 
duncle 
8 
8 
8 
7 
8 
8 
1 
8 
7 
8 
8 
8 
8 
7 
